1,720,985 research outputs found
Live-monitoring of Te inclusions laser-induced thermo-diffusion and annealing in CdZnTe crystals
No full textThe presence of Te inclusions is one of the main factors limiting performances of CdZnTe crystals as X-ray detectors. We show that by means of infrared laser radiation it is possible to move and anneal tellurium inclusions exploiting a thermo-diffusion mechanism. The process is studied live during irradiation by means of an optical microscope equipment. Experimental conditions, and, in particular, energy laser fluence, for annealing inclusions of different dimensions are determined
Optimization of Hermetia illucens (L.) egg laying under different nutrition and light conditions
Full text linkThe black soldier fly Hermetia illucens is gaining growing interest as a tool for the valorisation of bio-waste in a circular economy perspective. Although a wide variety of studies are available for larvae rearing, the indoor breeding of adults still presents a great challenge for industrial purposes. This study was designed to assess the simultaneous influence of 3 different light sources (the Mix of LED UV:blue:green 1:1:3, White LED, Neon light) and 3 types of nutrition (sugar and water, only water, no sugar no water) on adult performances, obtaining different egg production parameters that included the number and weight of the egg masses and single eggs laid by the females, the duration of pre-oviposition and oviposition period, the adult life span, the hatchability of the eggs. Our results showed that production parameters are influenced mainly by nutrition rather than light factor, although light plays an important secondary role. Moreover, the presence of sugar positively affects the egg production (12,93-27,10 mg eggs/female) and increases oviposition period (18,2-31,8 days) and adult lifespan (20,79-27,11 days). Light sources also affect egg production parameters, with the exposure to the Mix of LEDs resulting in the best performance of flies. Results obtained from this study are very useful for the design and management of an efficient industrial black soldier fly mass rearing process
Oriented orthorhombic Lead Oxide film grown by vapour phase for X-ray detector applications
No full textSeveral materials are under investigations for flat panel x-ray detector applications. Among them, PbO shows
interesting properties, i.e. high sensitivity, large stopping power and high resistivity at room temperature.
However, the exploitation of PbO is limited by the difficulty to obtain good quality films constituted by a
single phase. In this paper, we describe a new approach for the vapour phase growth of orthorhombic PbO
films. The grown layers show a single phase, good crystallinity, and preferential orientation along the c axis.
Optical characterization evidenced the presence of a broad defect band. Gold contacted films showed very high
electrical resistivity and appreciable response to X-ray radiation
Dispositivo per la deposizione di uova di ditteri stratiomiidi e un apparato per l’allevamento di ditteri stratiomiidi comprendente detto dispositivo
No full textTwo-step thermal process in tellurium vapor for tellurium inclusion annealing in high resistivity CdZnTe crystals
No full textExploitation of CdZnTe crystals for X-ray imaging detectors is limited by the incorporation of tellurium inclusions during growth. Over the years, several post-growth thermal treatments have been proposed for the removal of tellurium inclusions, often compromising the high electrical resistivity of the material. Moreover, main attention is usually paid to large inclusions, whose direct connection with the deterioration of detector properties has been demonstrated, while the effect of thermal annealing on small inclusions is usually neglected. In this article, the effect of different thermal annealing process on the concentration of inclusions down to 1 μm size is studied. A two-step process in tellurium vapors has been shown to be effective to anneal large tellurium inclusions and to preserve the high resistivity of the samples as well
UN SISTEMA E RELATIVO METODO PER LA RILEVAZIONE DI SOSTANZE INQUINANTI MEDIANTE UN VEICOLO PILOTATO DA REMOTO DA UN DISPOSITIVO APTICO DI COMANDO
No full textBioassays for the optimization of Hermetia illucens (L.) egg laying in a prototype of industrial plant
No full textThe black soldier fly Hermetia illucens (L.) (Diptera: Stratiomyidae) presents a particular interest for the feed and food industry as its larvae have the capacity to convert quickly and efficiently large quantities of organic waste or byproducts into a protein biomass rich in fats. Although the information on larvae development is abundant, the necessary knowledge of adult biology to produce large amounts of eggs remains a great challenge.
This work represents a part of a regional project (ValoriBio, Emilia Romagna, Italy) where one of the main outputs is the construction of a pilot plant for H. illucens mass rearing, which includes a module for adult rearing. Therefore, a specific custom-made climatic chamber was developed and it consisted in a thermally insulated container (1m3 volume), with a transparent window bearing a light-emitting diode (LED) lights source (UV, green and blue LEDs) on top. Temperature and humidity were controlled through a Peltier cooler/heater system, an ultrasound humidifier and several humidity-temperature digital sensors. An exterior electronic board connected to a touch screen was developed to control and record the rearing parameters. The biological parameters used to establish the functionality of the prototype were the patterns of oviposition, the egg weight and adult longevity.
Bioassays were conducted in tree types of climatic chambers at 27°C ± 0,5°C and 70 ± 5% relative humidity considering as treatments the use of different light sources (fluorescent tubes, white LEDs and the UV-green-blue combination of LEDs) and the flies diet (water and sugar, just water or nothing). The results allowed to identify the better conditions to obtain the highest amounts of eggs in the shortest time
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
- …
